Photos of the devastation caused by massive floods in Texas, Oklahoma, and Mexico

Over the Memorial Day weekend, parts of Texas, Oklahoma, and northern Mexico were hit hard by a massive rainstorm that has caused deadly flooding.

CNN reports that 22 people have been killed and a dozen more are missing. Two people died overnight in Houston, bringing the total to five fatalities in Texas and four in Oklahoma, while 13 died from the flooding in Mexico.

"We've seen flooding before, but not nearly to this extreme," Gage Mueller, a Houston resident for the past 40 years, told CNN. "It rains and it rains and it rains, and there's really nowhere for the water to go ... It's ridiculous."

Police stretch tape across a flooded Sixth Street in the city on Monday after days of heavy rain.

Local river Shoal Creek is threatening to overflow.

Drew Anthony Smith/Getty Images

By Monday night, the rain showed no signs of letting up.

Photo by Drew Anthony Smith/Getty Images

In nearby Houston, fans who had just watched the Houston Rockets play the Golden State Warriors were forced to stay in the Toyota Center arena because of emergency flash flooding, while the video board provided news.